Submarine or submersible boat.



C. LAURENTI.

SUBMARINB 0R SUBMBRSIBLE BOAT.

APPLIOATION FILED NOV. 11, 1910.

* 1,059.4,-75 Patented p1222, 1913.

h INVENTOR WITNESSES: E @W To (2Z6 cummiit may concern 'iiinjrrnn ofrnrino nfrnn"*r oFF GEEMKRE IIAURENTI, 01*" SPEZIA, ITALY, ASSIGNOR T FIATrSAN GIORGIO SOGIETA ANONIMA, 01E .SPEZIA, ITALY.

SUBMARIITE OR STJ'JBMEHSIBLE IBOA'LQ i ,llcm ljfj, Sneelllcnticn 01 Letters Patent.

Potential Apr. 22,1913.

Appllontlon lllcll November ll. 1910. Serial No. 581,779.

Be it knownthnt l, CESAJKE lnunncn'rr, n sub ect of the King of Italy, residing H'l Sperm, .linly, have invented certain now and inerniblo Bouts, of which the following is a.

Till

llii

rouierinl. to resist o. given orchn'nn-l pr ride hull of Moi This invention relates to submarine or subrnorsible lunits, and ninu; to provide certain irnprowmonin thcrein.

.ln n11 oppllcotion filed by me on the fouriecnth lifl'li of linguist, 1907, Serial No.

lifilllfi lfi, l have described and clnimeil sulmmrino or unlimuzruible bout having; on i'lr upper with. n, hollow suporstrncturr which cl ig nrrl to be tioiuleil uuiomznicully through portholere: or inlets when the hunt is submerged, and to nutoumticnlly expel the water therefrom by {gravity when the boot is enicrgerl or brought to surface-running trim.

lhe pr nt im'cntion relates to n ronstrnctionm.hull. useful in conl'lrction with bouts Oil tho general l-vpo set forth in said application, anti in pa. 'zulorly ilirooleil to the. oonntruciinn oi hull so for as it relates to :1. bout hnving n, onpcrntruciurn ol". the character thcroin sot forth.

In boots of this typo which nre prct'cr ably elliptical in UIObb-SQCilOH, problcnn; in hull construction are met with which are not jiresont in what may be cnllml the cylin- As is well known, at

clricnl typo of hull. hoot liming a cross-section wl'lioh is truly circuiur, requires the ininli'num weigh-i of more. finch boats, ho ever, do not torn g1 vnn lispin not rn-o icle the internal bilJftCl. which ii. irnblc oi 'rnrioun points in tho length of tho hull. for tho zn'mngmuont oi? the once sn'ry'intcrnal couipnnnll'. The cyliniilrjrhl type luminance con dormrtorl from in the vr a 'el tlforming; the subject matter of my n'torcsnirlimplication, and it has; licnce bccome clmaurnblo to provii'lc at construction of hull which is; no strong possible for a given weight oi material when the crossscctions deport more or less from the true circle.

rrccorzling to tho preecnt invention, .l pro- ,ril ilornlutiim, cornnrining preferably two ifltliibill arches, onoof which may he Stiliti to cor ituto tho. body oflho hull, nnd tho other "illB top clock portion thcrool. The particular constructionhost adopted for this p n-pose will be hereinafter described.

.llcgfcrring to the drawings, which illustrate one forrooii the invention, Figure l is a side elevation of u subn iurino or sub Inerniblc bout omlmclying tho invention; Fig. 33 is a transverse section taken amidships.

Referring to the drawings it will be noted that tho hull chown in Fig. l is not truly cylinlflricul. Its transverse sections are of varying shapes. throughout, ranging from tho :i nn'oximntely elliptical cross-section of Fig. 2'2 to more or losc irregular or complicated shnpcs which are not illustrated, some of which are shown in my prior application.

By reliorencc to Fig. 2 it will be seen that the boot illustrated is preferably composed substantially of :1 body portion A and n to or (look portion ll. The borly portion pre [JUZ'IJIOL may be located at: L, or at M. In

tho first case tho'cxterior'sholl of the deck portion is adopted to withstand the pressure, while. in the latter case the interior shell lhcreof performs this function. If the in tcrrenlng space between tho shells L and M is llcsigneil to be utilized as n selflmiling superstruciiurc, with ports freely open to wntcr pressure when the boat in submer ed, tho external and internal pressures of slicll. L will bo eryualizoclso that no great pressurercsistiug qualities need be present in the external plating. In this case the external pressures will be transmitted to the plating M and it is hence necessary to give the latter the necessary strength of construction. In either case, however, the upper arch with its crossed formation resists crushing strains, lrres motive of the location of the sheathing. It will be noted that the arch extends from the under side of the outer plntin I to the up: per side of the inner plating. ot only the transverse angle irons, but a so both platings ili'oresinting plating for the deck contribute essentially to the strength of the deck portion of the hull.

tion the maximum pressure-resisting qualities are attained with the minimum weight of material. This is true whether the deck portion forms a part (if a general elliptical cross-section or whether this elliptical crosssection is departed from even ,to a very material extent. I i

In some cases it is desirable in the length of the boat to arrange the pressure-resistin plating partly within the upper arch and partly on its exterior, in order toprovide main ortion thereof and a deck section said deck section comprising exterior and interior sheathing plates and trussed arches, said exterior and interior sheathing plates being attached directly to the upper and lower sides of said trussed arches, said deck section being above the water-line when the boat is running on the surface, and constituting between said exterior and interior sheathing plates aybuoyancy compartment 'adaptedto be filled with water when-the boat is submerged.

2. In a submarine or submergible boat, a hull having a body section, constituting the By this construcmain portion thereof, and a deck secti' said deck section comprlsing exterior and/ tenor sheathlng plates and single trus arches, said exterior and interior sheathing},

plates being attached directly to the upper and lower sides of said trussed'arches said,

deck section being above the Wat the boat is running on the surface, atid 'cen sheathing plates a buoyancy compartment adapted to be filledwith water when the boat is submerged.

3. In a submarine or submergibleboat, a hull having a body section,,comprising 1nverted trussed arches, constltutingthe main portion of the hull, and a deck section, said deck section comprising exterior and interior sheathing plates and, trussed arches, said exterior and interior sheathing plates bestituting between said exterior and interior ing attached directly to the upper and lower sides of said trussed arches, sald trussed deck arches resting on the inverted ends of said body-section arches and 'said interior sheath ing plates extending over-the inverted ends of said body-sectionarches to the, exterior v,

of the hull, said deck section being above the water-line when the boat is runmngon the surface, and, constitutin between said exterior and interior sheat ing plates a bum;-

ancy compartment adapted to be filled with water when the boat is submerged .In testimony whereof, I have hereunto signed my name in the presence of two sub scribing witnesses.

I CESARE LAURENTI.

Witnesses Gnino CoNAnn,

A. Bonxcma. 

